There's a misunderstanding that SQ(Sound Quality) is a system that can't play loud. Stock system also can't play loud but that's far from a real SQ system. So what is Sound Quality? SQ is that aspect of a sound system, which encompasses all of the performance factors which give the system the ability to re-produce an accurate and life-like rendition of the original recording as perfectly as possible. It includes factors such as tonality, ambience, subtle nuance, system gain structure, dynamics,transient response, and the list goes on and on.SQ is a combination of all these technical factors as well as properspeaker placement and proper system design. When a system is said to have perfect SQ, it generates the most accurate sound possible, with a sense of musical realism that gives the listener the impression that they "hear" a live performance right in front of them, as if the listener was in the audience watching the actual performers on an actual stage. Now, to get this realistic musical "sound stage" in a car, it takes careful system planning, speaker placement, and tuning.

From the reputable car audio enthusiast

http://teamaudionutz.com/a2.htm

Last edited by finalazy84 on 29/4/2013, 3:17 am; edited 9 times in total